Sun in H-alpha

bought my Maxscope40 from BCF some time ago: still entranced by it!

Hi Chris,

Yes. I have observed prominences changing shape, building up, ramifying and
dying down over periods as short as 5 mnutes.

Apart from that, a bird occasionally transits the sun's - the bird
is not actually ON the Sun! Nevertheles its effortless passage never fails
to make me gasp with pleasure and surprise.

I am experimenting with 2 Coronado H-alpha etalons in tandem to see whether
the transmission bandwidth can be further reduced by tiltin one with respect
to the other. Theoretically speaking, this should work since tilting
slightly shifts the position of the transmission peaks .

correction: 'the sun's disk'

Hi Chris,

Yes. I have observed prominences changing shape, building up, ramifying and
dying down over periods as short as 5 mnutes.

Apart from that, a bird occasionally transits the sun's disk. Granted - the
bird
is not actually ON the Sun! Nevertheles its effortless passage never fails
to make me gasp with pleasure and surprise.

I am experimenting with 2 Coronado H-alpha etalons in tandem to see whether
the transmission bandwidth can be further reduced by tiltin one with respect
to the other. Theoretically speaking, this should work since tilting
slightly shifts the position of the transmission peaks .


Ronald